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J. & O. SGHMERBER, & J. A. ARRAULT. Machine for Grinding and MixingCelluloid and Other Plasti'c Compositions or Substances.

No. 229,477. Patented June 29,1880.

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WITNESSES BY Wmmzf ORNEY S.

N. PETERS. PHOTO-LITHOGRAPHER, WASHINGTON. u c,

may be of any desired character.

UNITED STATES PATENT OFFICE.

JULES SCHMERBER AND CHARLES SCHMERBER, OF PATERSON, NEW JERSEY, AND JULES A. ARRAULT, OF NEW YORK, N. Y.

MACHINE FOR GRINDING AND MIXING CELLULOID AND OTHER PLASTIC COMPOSITIONS0R SUBSTANCES- SPEOIFIGATION forming part of Letters Patent No. 229,477,dated June 29, 1880.

Application filed November 17, 1875).

the county of Passaic and State of New Jer-' sey, and J ULEs A. ARRAULT,of the city, county, and State of New York, have invented a new anduseful Improvement in Machines for Grinding and Mixing Celluloid orother Plastic Compositions or Substances, of which the following is aspecification.

Our improvements relate to machines used for mixing and grinding plasticcompounds, such as pyroxyline compounds or others of which the solventsor part of the ingredients, being volatile, require working in closedapparatus to prevent loss of the volatile portions. We make use of ahollow cylinder for receiving the plastic material, formed with asteamjacket and fitted with a piston that is to be reciprocated bysuitable power, and the cylinder is connected by passages at itsopposite ends with the grinding-machine, so that by the movement of thepiston the material is forced back and forth through the grinder untilthe operation of mixing and grinding is completed, all of which is setforth more particularly hereinafter, with reference to the accompanyingdrawings, wherein- Figure 1 is a vertical longitudinal section of themachine. Fig. 2 is a sectional plan view. Fig. 3 is an elevation of thecutters and grinders in larger size. Figs. 4 and 5 are plan views of thecutters and grinders separately.

Similar letters of reference indicate corresponding parts.

B is a cylinder of suitable size, fitted with a removable cap or head,a, and formed with a jacket, 1), between which and the cylinder is aspace for steam that is to be supplied by suitable pipes. Within thecylinder b, fitting tightly, is the piston-head c on the end of the rodd.

C is a smaller cylinder, also formed with a steam-jacket, c, andconnected by the pipes f f with cylinder B. A shaft, g, that is to berevolved by suitable power by any desired connections, passes throughthe cylinder C, and carries within the same the cutters h andgrinding-cone i. These cutters and grinders As shown,

the cutters are fixed radially on shaft g, above and below the grinder,and the grinder is made in double conical form, with a ribbed surfaceand surrounded by a fixed curb, between which and the cone the materialwill pass. In the pipes ff are cocks m m, and in the lower part ofcylinder B is a screwplug, it.

The rod 61 and piston-head c are to be fitted for reciprocation by powerin any desired manner. As shown, the rod enters the hydraulic cylinder Aand carries therein a head, k. The cylinder is fitted at its oppositeends with pipes Z l, which will be connected to a forcepump, so thatwater can be injected at either side of head to move the rod d.

The machine is operated as follows: The piston-head 0 being at thelowest point, head a of the cylinder is to be removed, the material tobe worked placed in the cylinder, and the head a then replaced andsecured. Steam is then to be admitted to the jackets of the cylinders BC until the material is thoroughly heated to the required temperaturesayfrom 100 to 220 Fahrenheit-and the force-pump is then started foroperating rod d and the shaft 9 also put in operation. As the pistonrod01 moves upward the head 6 forces the material in the cylinder B,through the pipe f to the cylinder C, through the cutters hand grinders'i, and by the pipe f back to the cylinder B, beneath the head 6. Whenthe piston has finished its upward stroke the power is to be applied tocarry it downward and force the plastic material back through the pipef, cylinder C, and pipe f to cylinder B. This operation is to berepeated until the material is thoroughly ground and mixed to ahomogeneous mass. The piston is then to be stopped with the head 6 atthe upper end of cylinder B, the cocks m m are to be closed, plug itremoved, and the power then applied to bring the piston down and forcethe material out by the opening made by removal of plug n. The machineis then ready for a fresh supply.

It will be seen that the grinding and mixing operations are performedwhile the material is inclosed in air-tight spaces, and it is obviousthat the machine may be used to great advantage with materialscontaining volatile ingredients. The grinding and mixing will bethoroughly done and the operation kept up for the required length oftime, according to the character of the material being worked.

5 Having thus described our invention, we claim as new and desire tosecure by Letters Patent- 1. In machines for mixing and grinding plasticmaterials, the closed cylinder B, for

[0 receiving the material, fitted with a reciproeating piston, and thecylinder (1, connected at top and bottom with cylinder B, and fittedwith the cutters and grinders, combined subtantially as described andshown.

15 2. In machines for mixing and grinding plastic materials, the closedcylinder B, for containing the material, surrounded by a steamjacket, asand for the purposes set forth.

3. In machines for mixing and grinding plastic material, the closedcylinder 0, fitted 20 with the shaft 9, cutters h, and grinder t, andprovided with inlet and outlet pipes for the passage of the material,substantially as described and shown.

4. In machines for grinding and mixing 2 5 plastic material, thecombination,with a closed cylinder for receiving the material and thereciprocating piston, of a hydraulic cylinder fitted with pipes for theinjection of liquid, sub stantial] y as and for the purposes set forth.

JULES SOHMERBER. CHARLES SOHMERBER. JULES A. ARRAULT. Witnesses:

GEO. D. WALKER, G. SEnowIcK.

